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Inverse Proportion

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Junior | Next Rank: 30 Posts
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Inverse Proportion

by Bhandaripreeti » Sat Oct 06, 2007 4:42 am
If c is directly proportional to d and inversely proportional to e, and when and , which of the following is true for all values of c?

1) c=d/e

2) c=de/3

3) c=3d/4e

4) c= 4e/3d

5) c=12e/d

Ans 3
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by kajcha » Sat Oct 06, 2007 6:09 pm
c is directly proportional to d means c = a*d where "a" is a constant

c is inversely proportional to e. means c = b/e where "b" is a constant

together c can be written as

c = a*d*b/e. Only answer choice 3 is in this format.
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by gmatguy16 » Sun Oct 07, 2007 9:32 am
is the question complete,why is the answer not a ?
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